Develop Reference

How to double click on radiobutton to uncheck instead of one click

I'm using 2 groups of radio buttons lets call it 1.1 1.2 and 2.1 2.1 (one radio button of the second group is always checked, depending on which one of the first group is checked, the other one is hidden).
I can't understand why I need to make a double click on the radio button to uncheck it when both radio buttons are checked. I want to click just one time to "uncheck" it.
function show() {
swich();
}
function swich() {
$('input[type="radio"]').change(function(){
$('[data-group="' + $(this).data('group') + '"]').prop('checked', this.checked);
});
}
var checkedradio = false;
var radioState = [];
$("input[type=radio]").on('click', function(e) {
if (radioState[this.name] === this) {
this.checked = false;
radioState[this.name] = null;
} else {
radioState[this.name] = this;
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input data-group="A" id="radio1" required type="radio" value="Yes" name="group1">
<input data-group="B" id="radio2" required type="radio" value="No" name="group1">
<div id="someId1">
<input data-group="A" id="radio3" type="radio" name="group2" value="Yes" onclick="show()">
</div>
<div id="someId2">
<input data-group="B" id="radio4" type="radio" name="group2" value="No" onclick="show()">
</div>

CAVEAT
We do not recommend you take this approach as it breaks the standard UX for radio buttons.
Your issue is because you re-use checkedradio for both checks.
So:
click group A.1 - sets checkedradio = A.1
click group A.1 again, works ok and unchecks
click group A.1 - sets checkedradio = A.1
click group B.1 - sets checkedradio = B.1
click group A.1 (checked) - it's not A.1, so doesn't appear to work, set checkedradio = A.1
click group A.1 2nd time, works ok
You need a different variable for each group.
As multiple variables become very messy very quickly (and lots of DRY), you can use an array:
var radioState = [];
$(":radio").on('click', function(e) {
//console.log(radioState[this.name])
if (radioState[this.name] === this) {
this.checked = false;
radioState[this.name] = null;
} else {
radioState[this.name] = this;
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input required type="radio" value="Yes" name="group1">
<input required type="radio" value="No" name="group1">
<hr/>
<input type="radio" name="group2" value="Yes">
<input type="radio" name="group2" value="No">
Code based on this answer expanded to use an array.

I was able to achieve the desired result based on this code.
function show() {
swich();
}
function swich() {
$('input[type="radio"]').change(function(){
$('[data-group="' + $(this).data('group') + '"]').prop('checked', this.checked);
});
}
function toggleRadio(event)
{
if(event.target.type === 'radio' && event.target.checked === true)
{
setTimeout(()=>{ event.target.checked = false; },0);
}
}
document.addEventListener('mouseup', toggleRadio);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input data-group="A" id="radio1" required type="radio" value="Yes" name="group1">
<input data-group="B" id="radio2" required type="radio" value="No" name="group1">
<div id="someId1">
<input data-group="A" id="radio3" type="radio" name="group2" value="Yes" onclick="show(this)">
</div>
<div id="someId2">
<input data-group="B" id="radio4" type="radio" name="group2" value="No" onclick="show(this)">
</div>

Is there way to click multiple checkboxes when a option(check box) is on and when it is off you can only select one at a time?

I want to be able to perform the functionality in the picture above. It wont work however.
$("#customSwitches").click(function() {
var $this = $(this);
if ($this.data('clicked')) {
alert("not element clicked");
$this.data('clicked', false);
$(document).on('click', "#radio1, #radio2, #radio3, #radio4").not(this).prop('checked', false);
});
} else {
alert("element clicked");
$this.data('clicked', true);
}
});

In each click of the check box from the groups, you can checked the checked property of #customSwitches. If it is not checked then you can count the length of checked check boxes from the group, if it is more than 1 then you can prevent the default event.
When clicking #customSwitches you can reset all the check boxes from the group.
You can try the following way:
$(".vehicle").click(function(e){
if($('#customSwitches').is(':not(:checked)')){
if($('.vehicle:checked').length > 1){
alert('You can not check multiple');
e.preventDefault();
}
}
});
$("#customSwitches").click(function(e){
$(".vehicle").prop('checked', false);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<label for="customSwitches"> Select Multiple</label><input type="checkbox" id="customSwitches">
<hr/>
<input class="vehicle" type="checkbox" name="vehicle1" value="Bike">
<label for="vehicle1"> I have a bike</label>
<input class="vehicle" type="checkbox" name="vehicle2" value="Car">
<label for="vehicle2"> I have a car</label>
<input class="vehicle" type="checkbox" name="vehicle3" value="Boat">
<label for="vehicle3"> I have a boat</label>

Your current code has some syntax issues and uses nested event handlers, which is not a good design pattern.
In basic terms you are trying to build a dynamic checkbox limiter based on the first checkbox state. To do that simply determine if the first box is checked, and then count the number of checked regions to see if it exceeds the limit. If so, disallow the current box to be checked. Try this:
let $allowMulti = $('#allow_multi').on('change', function() {
if (!this.checked)
$('.region').prop('checked', false); // remove all checks if no multi allowed
});
$('.region').on('change', function() {
let selectedCount = $('.region:checked').length;
if (!$allowMulti.prop('checked') && selectedCount > 1)
$(this).prop('checked', false);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<p>
<label>
<input type="checkbox" id="allow_multi">
Select multiple regions
</label>
</p>
<label>
<input type="checkbox" class="region" value="1"> 1
</label>
<label>
<input type="checkbox" class="region" value="2"> 2
</label>
<label>
<input type="checkbox" class="region" value="3"> 3
</label>
<label>
<input type="checkbox" class="region" value="4"> 4
</label>

How to check specific number of checbox and disable remaining using jquery?

In a specific DIV having .vipGuests that have multiple checkboxes (More than 12), I want to select maximum 12 checkboxes.
As soon as user select 12th checbox then remaining checkbox will get disabled.
My below mentioned code is only counting number of checkbox that are checked. How I can implement the functionality so that user can check maximum 12 checkbox and remaining will get disabled.
$('.vipGuests input[type=checkbox]').on('change', function () {
var totalGuest = 0;
$('.vipGuests input[type=checkbox]:checked').each(function () {
totalGuest++;
});
});
Note: The main thing is that each time during check/uncheck when counter of Checkboxes that are checked is 11 then all checkbox will be active. Only when counter is equals to 12 then the only unchecked checboxes will get disabled.

You can use :not() selector and select un-checked checkbox and disable them. Also you don't need to use .each() to get count of checkbox. Use length property instead.
$(".vipGuests :checkbox").on("change", function(){
if ($(".vipGuests :checkbox:checked").length >= 3)
$(".vipGuests :checkbox:not(:checked)").prop("disabled", true);
else
$(".vipGuests :checkbox:not(:checked)").prop("disabled", false);
});
$(".vipGuests :checkbox").on("change", function(){
$(".vipGuests :checkbox:not(:checked)").prop("disabled", $(".vipGuests :checkbox:checked").length >= 3);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="vipGuests">
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
</div>

You can simply rely on length of jQuery object to check if 12 items are selected.
Use :not(:checked) selector for disabling non-checked inputs.
var $checkboxes = $('.vipGuests input[type=checkbox]');
$checkboxes.on('change', function() {
if ($checkboxes.filter(":checked").length >= 12) {
$checkboxes.filter(":not(:checked)").prop("disabled", true);
} else {
$checkboxes.prop("disabled", false);
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="vipGuests">
<input type="checkbox" checked/>1
<input type="checkbox" checked/>2
<input type="checkbox" checked/>3<br/>
<input type="checkbox" checked/>4
<input type="checkbox" checked/>5
<input type="checkbox" checked/>6<br/>
<input type="checkbox" checked/>7
<input type="checkbox" checked/>8
<input type="checkbox" checked/>9<br/>
<input type="checkbox" checked/>10
<input type="checkbox" checked/>11
<input type="checkbox" />12<br/>
<input type="checkbox" />13
<input type="checkbox" />14
<input type="checkbox" />15
</div>

You can use a global variable as below:
var totalGuest = 0;
$(".vipGuests :checkbox").on("change", function(){
this.checked?totalGuest++:totalGuest--;
$checkboxes.filter(":not(:checked)").prop("disabled", (totalGuest>=12)?true:false);
});

Hope this will help you.
JSFiddle Link
Code:
var totalGuest = 0;
$('div input[type=checkbox]').not(":radio,:submit").on('change', function () {
$(this).toggleClass("active");
if($(this).hasClass("active")) {
totalGuest ++;
}
else {
totalGuest --;
}
if(totalGuest >= 12) {
$('input[type=checkbox]').not(".active").attr("disabled","disabled");
}
else {
$('input[type=checkbox]').not(".active").removeAttr("disabled");
}
});

How to use jQuery for listening if checkbox is changed not by clicking?

I have a number of checkboxes that change state(checked ,not checked) using another jQuery statement:
Elements:
<input type="checkbox" id="select_a">select group A</input>
<input type="checkbox" id="select_b">select group B</input>
<input type="checkbox" id="mix">select mix</input>
<div id="group_a">
<input type="checkbox" id="a_1">group A_1</input>
<input type="checkbox" id="a_2">group A_2</input>
</div>
<div id="group_b">
<input type="checkbox" id="b_1">group B_1</input>
<input type="checkbox" id="b_2">group B_2</input>
</div>
JQUERY
jQuery("#select_a").click(function () {
if (this.checked) jQuery("div#group_a input:checkbox").prop("checked", true);
else jQuery("div#group_a input:checkbox").prop("checked", false);
});
jQuery("#select_b").click(function () {
if (this.checked) jQuery("div#group_b input:checkbox").prop("checked", true);
else jQuery("div#group_b input:checkbox").prop("checked", false);
});
jQuery("#mix").click(function () {
if (this.checked) {
jQuery("#a_1").prop("checked", true);
jQuery("#b_1").prop("checked", true);
} else {
jQuery("#a_1").prop("checked", false);
jQuery("#b_1").prop("checked", false);
}
});
I need a way to set a listener to each checkbox in the groups, I used this way which works like this:
jQuery("div input:checkbox").click(function(e){
alert(e.target.id);
});
but this only works if the checkbox was clicked by the mouse, I would like a way to fire an event(set a listener) for each checkbox if it was checked by something other than the mouse.
Demo

You can use change() event handler
jQuery("div input:checkbox").change(function(){
alert(this.id);
});

Try change event, also for the top controls use radio instead of checkbox as any one would be checked:
$(function() {
var grp1 = $('#group_a').find('input[type=checkbox]');
var grp2 = $('#group_b').find('input[type=checkbox]');
$('input[name=grp]').on('change', function(e) {
var id = this.id;
grp1.prop('checked', 'select_a' === id);
grp2.prop('checked', 'select_b' === id);
if ('mix' === id) {
grp1.eq(0).prop('checked', true);
grp2.eq(0).prop('checked', true);
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<!-- use radio with name -->
<input type="radio" name="grp" id="select_a" />select group A
<input type="radio" name="grp" id="select_b" />select group B
<input type="radio" name="grp" id="mix" />select mix
<div id="group_a">
<input type="checkbox" id="a_1" />group A_1
<input type="checkbox" id="a_2" />group A_2
</div>
<div id="group_b">
<input type="checkbox" id="b_1" />group B_1
<input type="checkbox" id="b_2" />group B_2
</div>

checking all checkboxes jquery

Why in my js code can just with one click on name:check_all checking all checkboxes?
HTML:
<div id="ss">
<input type="checkbox" name="check_all">
</div>
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
jQuery:
$(document).on('click change','input[name="check_all"]',function() {
var checkboxes = $('.idRow');
if($(this).is(':checked')) {
checkboxes.attr("checked" , true);
} else {
checkboxes.attr ( "checked" , false );
}
});
DEMO: http://jsfiddle.net/KdaZr/
My jQuery version is 1.9.
How can fix it?

Use prop method. When your markup is rendered attributes become properties of the elements, using JavaScript you should modify properties of the element.
$(document).on('change','input[name="check_all"]',function() {
$('.idRow').prop("checked" , this.checked);
});
http://jsfiddle.net/GW64e/
Note that if input[name="check_all"] is not generated dynamically there is no need to delegate the event.

Use .prop, not .attr, to change properties of elements. .attr is for HTML attributes.
http://jsfiddle.net/KdaZr/1/

fix is as follow:-
$(document).on('click change','input[name="check_all"]',function() {
var checkboxes = $('.idRow');
if($(this).is(':checked')) {
checkboxes.each(function(){
this.checked = true;
});
} else {
checkboxes.each(function(){
this.checked = false;
});
}
});

A complete solution select || deselect checkbox jQuery :
$(document).ready(function() {
$("#checkedAll").change(function(){
if(this.checked){
$(".checkSingle").each(function(){
this.checked=true;
})
}else{
$(".checkSingle").each(function(){
this.checked=false;
})
}
});
$(".checkSingle").click(function () {
if ($(this).is(":checked")){
var isAllChecked = 0;
$(".checkSingle").each(function(){
if(!this.checked)
isAllChecked = 1;
})
if(isAllChecked == 0){ $("#checkedAll").prop("checked", true); }
}
else {
$("#checkedAll").prop("checked", false);
}
});
});
Html should be :
Single check box on checked three checkbox will be select and deselect.
<input type="checkbox" name="checkedAll" id="checkedAll"></input>
<input type="checkbox" name="checkAll" class="checkSingle"></input>
<input type="checkbox" name="checkAll" class="checkSingle"></input>
<input type="checkbox" name="checkAll" class="checkSingle"></input>
Hope this helps to someone as it did for me.